Concrete-mixer.



PATENTED APR. 14, 1908.

P. A. KOEHRING.

CONCRETE MIXER. APPLIOATIOH FILED JUNE 27.1907,

2 SHEETS-SHEET 1.

INVENTUR l l' lHlHlllk- I up 1| i" WITNESSES:

PATEN LBD APR 14, 1908.

P. A. KOEHRINGQ CONCRETE MIXER.

AEPLIOATIO I LPIL D JUNE 27.1907.-

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l INVENTOR W 4,

WITNESSES UNITED STATES PATENT OFFICE.

PHILII A. KOEl-lRING, Ol. MILWAUKEE, WISUONSIN.

GONCEETE-MIXER.

No. assoc? To all whom it may concern.

Be it known that l, PnILiP A. Koinnumi, a citizen of the United States, residing at Milwaukee, county of lllilwaukee, and State of Wisconsin, have invented. new and useful Improvements in (loncretedilixers, of which the following is a specification.

My invention relates to improvements in that class of con cretem ixers in which cement, sand and other materials com )osing the con crete are mixed together within a revoluble drum and it pertains to the means employed for discharging the concrete from the rotating drum at the will of the operator.

The object of my invei'ition is t" provide a rotary mixing drum having meai'is for discharging the contents, with a manually adjustable device whereby the discharging means may be rendered inoperative at will although continuously actuated, the drum being thus c'aused to alternately mix the material and discharge the same while being continuously rotated.

Figure 1- is a side view partly broken away to show the interior of the drum and the dis charging apparatus. Fig. 2 a detail end view of the discharge apparatus. F ig. 3 is a plan view of the drum and its discharg'c apparatus- Like i arts are identified by the same ref erence ngures throughout the several views.

1 represents the drum, which revolubly supported from the frame 2 of the vehicle t rough the rollers, 23, 3, and roller supporting brackets 4. Motion is communicated to the drum. 1 from the sprocket chain 5 through the sprocket wheel 6, wheel sup porting shaft 7, pinions 8, 8, and two an- *iular series of cog teeth, 9, 9, wnich series of teeth, 9, 3,. are secured to the peripl'iery of the drum. The shaft 7 is supported from the frame at its respective ends by the brackets l0, 10. The mechanism thus far described is substantially of ordinary 'con. struction. A. U-shaped trough 1Z2 rigidly mounted upon the frame work 2 by means of vertically disposed angle iron standards, l5, l3, and horizontally disposed bars H l l secured. thereto by rivets i l in the usual manner. The trough 12 extends into the open end 15 of the drum, and adapted to receive the material which is elevated and discharged into the receiving end of the trough by bucket fian e-s 31 on the imicr surface of the drum. The trough prefer ably horizontally disposed and the material Patented April 14, 1908.

Serial No. 381,008.

is pushed to the discharge end by convc er the trough is uncovered and receives the ma terial discharged .in that direction by the bucket flanges 31. When moved to the position indicated by dotted lines in Fig. 1, the rcwiving end of the trough is covered and the material from the buckets falls to the bottom of the drum, being subdivided by the hood 33 which facilitates the mixing operation. The hood is adjusted along the bars 14 by means of a rod 35 and handle 36. i The convey-"er blades remove the material received by the trough by pushing it out- Wardly to the discharge end;

It is obvious that with my. discharge agparatus, a quantity of the concrete way 0 :rst inixed and then discharged from the drum Without interruptin its continuous When rotation, the mixin and discharging operations being controlled by the hood 33.

22 is a hopper through which the materials to be mixed are fed into the drum at itsreceiving end while the same is being rotated. The hopper 22 is supported fronrthe su porting frame of the vehicle upon the stand with which standards it is connected by rivets 23 in the ordinary manner.

. The frame 9 upon which the drum 1 is mounted is preferably supported on a.

Wheeled vehicle of ordinary construction by.

which the machine is readily transported from ,one place to another.

It will be understood that the concrete in the drum is mixed dry.

Water is supplied ards 13" to if during its discharge, from a pipe 40 proride-d. with spraying perforations 41 anda valve -22 controlling the ilow of water to this pipe from a supply pipe 43. The-Water is cut oil from the pipe it) during the mixin operation, which continues until a su ply o com-rote is desired, whereupon the li ood is moved back to the position n which it is shown, in Fig. 1 and thev ve 41 opened. The concrete will then be do vered from the drum and moistened from the pipe 4] until the hood is returned to the dotted line posi: tion of Fig. 1, when the water will also be againshut oil and the mixing operation without delivery will he resumed.

Having thus described my invention what I claim as new and desire to secure by Let ters Patent is,

1. in a concrete mixer of the class descrihcd, the combination of n rovoluhle drum provided on its inner walls with an an .nular'series oi' elevating and liaising buckets, means for delivering the ingredients into said drum, a discharge trough having a receiving end extended within said drum, n slidahle hood adapted to cover the receiving end of said trough, means for shifting said hood into" and out of covering position wherehy the contents of said drum may st the will of the operator he caused to fall into the roeeiving end of said trough or hack into the lower portion of the drum.

2. In a concrete miner of the class de scribed, the combination of a revoluhle drum provided on its inner walls with an annular series of elevating and mixing huckets, means lor delivering the ingredients into said drum, a discharge trough having a receiving end extended within said drum, a slidahle hood adapted to cover the receiving end ol said trough, means for shifting said hood into and out oi. covering position wlierehy the contents of said drum may at the will of the operator he caused to l'all into the receiving end of said trough or back intothe lower )ortion of the drum, and a conveyor l'oi' discharging the concrete from said trough.

3. In a. concrete mixer ol the class descri ,Qtl, the coinhinution of a revoluhle drum provided on its inner walls wit-h an annular series of elevating and mixing buckets, int-ans for delivering the ingredients into said drum, a discharge trough having a receiving end extended within said drum, a slidahle hood adapted to cover the receiving end of said trough, means for shifting, suid hood into and out of: covering position where-h the contents of said drum ma at the will o1" the operator be caused to in] into the receiving end of said trough or back into the lower )ortion of the drum, and a coi'iveyer for discharging the concrete f1 Olll said trough consisting of a centrally disposed rotary shalt suitably journalod in hearings and having a spiral series 0]. propeller hladcs radially mounted thereon.

4. .ln a concrete mixer of the class descrihed, the combination oF a revoluble mixing and elevatin device, a receiver for the elevated materin and an adjustable hood therefor adapted to he moved to cover or uncover the receiver, said hood being arranged to return the material falling thereon into the lower portion of the mixing device.

5. in a concrete mixer oi the class described, the combination. of a revoluhle mix ing and elevating device, a receiver for the elevated material and an adjustable hood therel'or adapted to he moved to cover or uncover the receiver, said hood lining arranged to return the material falling thereon into the lower portion of the .n'iixing device, together with means [or delivering wateeinto the material during its delivery from the mixing device. 4

in testin'iony whereof 1 still); my signature in the presence ol' two witnesses.

M. M. SUllVl/A, (l. it. lfinwiu. 

